Maglula's x10/v10 set of loaders is ideal for loading .22 LR cal. Single-stack narrow mags with a projecting side button. A set of two loaders for loading .22LR cal. single-stack narrow mags with a projecting side-button like:Beretta U22 NEOSBrowning BuckMarkCOLT Woodsman/CadetHigh-Standard .22Ruger MK I II III IV 22/45S&W 22A/22S (only X10-LULA will load well)S&W VictoryCaliber: 22 LRFinish: BlackMaterial: PolymerType: LoaderModel Fit: Single Stack Mag